EP 0626223 B1 19960508 - Method and apparatus for adjusting pressure of cushioning pneumatic cylinder pressure on press, when cushion platen is at its setup position
Title (en)
Method and apparatus for adjusting pressure of cushioning pneumatic cylinder pressure on press, when cushion platen is at its setup position
Title (de)
Verfahren und Vorrichtung zum Anpassen des Kissenzylinderluftdruckes in einer Presse in der Einrichtungsposition der Kissenplatte
Title (fr)
Méthode et dispositif pour l'ajustement de la pression pneumatique dans le cylindre du coussin d'une presse, quand la plaque du coussin se trouve dans la position de montage
Publication
Application
Priority
JP 14692593 A 19930525
Abstract (en)
[origin: EP0626223A1] In a cushioning device (42) of a press having a pneumatic cylinder (32) for producing a blank-holding force (Fs) to be applied to a blank (40) through a cushion platen (26) and a pressure ring (28), an optimum initial value (Po) of the pneumatic pressure of the pneumatic cylinder when the cushion platen is placed at a setup position lower than the lower stroke end is calculated based on die-set information relating to the pressure ring and including a predetermined optimum value (Fso) of the blank-holding force, and machine information relating to the cushioning device, so that the calculated optimum initial pneumatic pressure provides the optimum blank-holding force during a pressing operation, irrespective of a volumetric increase of the pneumatic cylinder due to a movement of the cushion platen from the setup position to an operating position for the pressing operation. The pneumatic pressure (Pa) is adjusted to the calculated optimum initial value (Po) when the cushion platen is located at the setup position.
IPC 1-7
IPC 8 full level
B30B 15/02 (2006.01); B21D 24/02 (2006.01); B21D 24/14 (2006.01)
CPC (source: EP US)
B21D 24/02 (2013.01 - EP US); B21D 24/14 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0626223 A1 19941130; EP 0626223 B1 19960508; CA 2124173 A1 19941126; CA 2124173 C 19991123; DE 69400171 D1 19960613; DE 69400171 T2 19961002; JP 2689855 B2 19971210; JP H06335734 A 19941206; US 5528918 A 19960625
DOCDB simple family (application)
EP 94303639 A 19940520; CA 2124173 A 19940524; DE 69400171 T 19940520; JP 14692593 A 19930525; US 24674894 A 19940520